[Can't to switch back combat style]

I played for the sith-juggernaut, after completing the quest I got 2 Marauder combat style. I switched to the Marauder, but I can't switch back to the Juggernaut. Error: you no longer have access to this loadout's combat style. Would you like to save over this loadout? What to do?

[Replay of additions]

I was finished The fallen empire and The eternal throne. Can i begin this additions again with saving of new progress taking into account the new decisions ?